package com.zc.serviceuser.Interceptor;

import com.alibaba.fastjson.JSON;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zc.commonutils.Constants;
import com.zc.serviceuser.entity.User;
import com.zc.serviceuser.entity.dto.UserDTO;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class RefreshTokenInterceptor implements HandlerInterceptor {

    private ObjectMapper objectMapper;
    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor( StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Autowired
    public RefreshTokenInterceptor(ObjectMapper objectMapper) {
        this.objectMapper = objectMapper;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1.获取请求头中的token
        String token = request.getHeader("authorization");
        if (StringUtils.isBlank(token)) {
            return true;
        }
        // 2.基于TOKEN获取redis中的用户
        String key  = Constants.LOGIN_USER_KEY + token;
        String userStr = stringRedisTemplate.opsForValue().get(key);

        // 3.判断用户是否存在
        if (StringUtils.isBlank(userStr)) {
            return true;
        }
        // 5.将查询到的hash数据转为UserDTO
//        UserDTO userDTO = objectMapper.readValue(userStr, UserDTO.class);
        User user = JSON.parseObject(userStr, User.class);
        System.out.println(user.toString());
        UserDTO userDTO = new UserDTO();
        userDTO.setUsername(user.getUserName());
        userDTO.setId(user.getId());
        userDTO.setRole(user.getRole());
        System.out.println(userDTO.toString());
        // 6.存在，保存用户信息到 ThreadLocal
        UserHolder.saveUser(userDTO);
        // 7.刷新token有效期
        stringRedisTemplate.expire(key, Constants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        // 8.放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 移除用户
        UserHolder.removeUser();
    }
}
